Tension device for sewing-machine binders



(No Model.) J r P. W. GOAN 8?; W. S. EATON.

TENSIONDEVIGE FOR SEWING MACHINE BINDERS.

Patented Aug. 10,1897.

Wfinesses QM,

NoRms PETERS co. wm'aumqv WASHKNGTON u UNITED STATES PATENT OEFroE.

FRED WV. COAN AND \VALTER S EATON, OF MANCHESTER, NEW HAMPSHIRE.

TENSION DEVICE FOR SEWING-MACHINE BINDERS.

SPECIFICATION forming part of Letters Patent No. 587,707, dated August10, 1897.

Application filed August 8, 1896. Serial'No. 602,125. (No model.)

To all whom it may concern:

Be it known that we, FRED W. COAN and WALTER S. EATON, citizens of theUnited States, residing at Manchester, in the county of I-Iillsboroughand State of New Hampshire, have invented certain new and usefulImprovements in Tension Devices for Sewing- Machine Binders; and we dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The invention relates to tension devices for machines adapted to securebands and button-stays by sewing.

Bindings which are composed of selvaged material have been folded andsewed at one operation; but the mechanism employed to do such work willnot serve our purpose, as the material used for trousers-bands orbutton-stays of knit underwear is raw-edged, and the edges must beturned under before being stitched to the goods, thus requiring threefoldings of the button-stays, while a binding requires to be folded butonce.

The object of our invention is to provide an eflicient tension devicefor sewing-machines.

In the accompanying drawings, Figure 1 is a plan view representing aportion of a sewing-machine, including the work-plate, the

band or button-stay passing from the spool containing it to our improvedfolder, and our improved feeding mechanism, which feeds both the knitfabric and its stay in their proper relative position under the needleof.

a sewing-machine. Fig. 2 is a detail view of our improved folder,showing its separate chambers, one for running the band or button-stayand the other for the edge of the 'article to which the stay is to bestitched. Fig.

through which the various working parts of the machine are reached, andf is an opening through which the feed-dog rises.

G is our improved top feed, consisting of a segment of a cylinder,having at one end an eccentrically-projecting shaft H, mounted in abracket or frame I, which is screwed to the plate F, said shaft H beingprovided with a.

crank J, to which is connected, by screw j, one end of a rod K, theopposite end of said rod reaching over the back of the work-plate F to apoint underneath the same, where it is connected in any convenientmanner to the rocker-frame C, by which the top feed G is given a rotarymotion coinciding in direction with the forward-anil-backward movementof the feed-dog E.

The top feed G has its outer surface ser rated,,as at g, and is providedin one of its edges with a slot g, formed sufficiently long to receiveand permit the vertical movement of the machine-needle X during therotative operation of the top feed.

By causing the circumference of the top feed to be eccentric with theshaft by which it is carried it is readily adjusted high or low or runas close to the work as may he wished, and also the feed may be given alonger or shorter stroke than the under feed by properly setting thecrank J upon the shaft H.

Our improved folder comprises a shell or caseoL, inclosing a die or formL, and the shell is provided with an arm M, secured to one end thereofand running parallel therewith, this arm being passed through a bearingm, formed upon one end ofa plate M, which is provided with an elongatedopening m for the insertion of a fastening-screw m threaded to thework-plate.

The die or form L is made tapering from end to end and is curved .orrounded on. one side, as at Z, the opposite side being flat, as at Z,with the rounded portion extending be yond on each side in the form offlanges Z and near each flange and in the flat portion Z is a groove Zto receive either edge of the shell L, wherein they may be securelyfastened by soldering.

The recess formed between the flanges Z affords opportunity for feedingthe edge of the undergarment through the folder at the same time withand in. proper relation to the band or button-stay, so that both may bestitched at once evenly and without danger of fulling one upon theother.

The material Z, forming the stays or bands, after being cut the properor required width is wound vevenly upon a spool, such as represented atN, said spool being mounted on a spindle 71, mounted near one end of aplate 0, the opposite end of said plate being provided with a jointedarm P, carrying a spindle 19, said spindle acting as a guide for thematerial Z, as shown. The jointed arm P provides a band-guide adaptedfor adjustment to vary the direction of the band as it leaves the mainpart of the tension device and thereby to slightly vary the tensionwithout the delay and inconvenience attending an adjustment of the maintension device.

Our adjustable tension device consists of a frame Q, adj ustably securedto said plate 0, and containing a series of bars q and a series of barsq, rigidly secured to the plate 0, the last-named set of bars fittingbetween those of the adjustable frame and Within slots (1 formed thereinfor this purpose, said frame being adj usted-to ward or away from thebars q by means of an elongated opening g through which a set-screw Rpasses and is threaded to the said plate 0. To pass the ter and those ofthe frame Q. Then the frame is moved toward the bars q until therequired tension is reached, when the set-screw B may be turned down, bywhich, means a perfectly even tension of various degrees may be easilymaintained.

Having described our improvements, what we claim is-e- The combinationof the sewing-machine, a. band-holding spindle or roller, a tensiondevice, and a band-guide consisting of a hinged arm situated between thesaid tension device and the stitching mechanism, whereby the directionof the band can be changed and the tension varied without disturbing themain tension device, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

FRED W. COAN.. YVALTER S. EATON.

Vitnesses:

J. B. THURSTON,

HENRY E. BURNHAM.

